Spark-plug.



G. P. B. HOYT.

SPARK PLUG.

APPLICATION FILED MAR. 25, 190B.

Patented Mar. 30, 1909.

I 2 SHEETS-SHEET l.-

m5 w w w a WITNESSES ATTORNEYS G. P. B. HOYT.

SPARK PLUG.

. APPLICATION FILED MAR. 25, 1908.

Patented Mar. 30, 1909. I

2 SHEBTSSHEET 2.

INVENTOH awrzezf/a /z WITNESSES ATITOHNE rs TQATENT SPARK-PLUG.

Specification of Letters Patent.

Patented March 80, 1909.

Application filed March 25, 1908. Serial No. 423,195. I

To all whom it may concern:

be it known that l, tumour. l. B. l'lOYT, a citizen of the initcd States, end resident oi the city oi New York, 'lannziiro, borough of Queens, in the county of Queens and State of New York, have invented a. new and Improved Sr'n'u'lL-llug, oi which the following is a. lull, clear, rind exert description.

The invention relates to igniting devices of the niche and break COIltZLUt type, and its object is to provide :i' new and improved spark plug for use on internal combustion engines and other sppsretus, and arranged to insure the production of a powerful spznl: with greet sccurecy.

The invention consists oi novel features and parts and combinations of the some, which will be more fully described.hereincriter and tl'ien pointed out'in the claims.

A pinctical embodiment of the invention is represented in the accompanying drawii forming a. part of this specification, in which similar cherscters'oi reference indicote correspmiding parts in all the views.

Figure 1 is a side elevation of the ini- PIOVGYQGDC, the casing appearing in section and the ports in the position of rest; Fig. 2 is, :1. sectional side elevation oi the some, showing the zn'nieture attracted; Fig. 3 is o sectionziil plan view of the improvement on the line 3f--3 of Fig. 1; 4 is a like view of the Sztlilti on the line l -e of Fig. .2; Fig. 5 is e. diegrsninmtic view of the iniprrwcrnent as applied to a multiple cylinder engine, and Fig. 6 is a diagrammatic view of the improvementnnd showing it modified form of the electrical connections.

On the screw cap A is secured a casing l3, preferably mode of hard rubber, iiher or other suitmhlc insulating nmterisil, end in the casing H is mount d on electro-niognct i, having an oscillating ti'iilzttilit. ll, the shell; D ofwhich is rnouni cd in it suitable support arranged. on the electro-inegnet. 'l 'hc srnie. ture D is pressed on by a spring); 1C connected with a. post B arrai'iged in the casing B, and the said spring lil serves to normally hold the armature l) in an inactive position, that is, out of olinenient with the cores or poles of the (-l(5(tl()l1'l2t ll6l3 C, plainly indicated in Figs. 1 and 3. i

On one end of t e armature l) is arranged a. pin it adopted to engage one end of {in arm F, sccu red on the upper end oi the shaft G of the movable contact with the iixed electrode ll extending electrode G, adopted to ti-ital supply,

' through an insulating bushing H arranged in the screw cap A, as plainly indicated in Fig. '3. The shaft G extends through the screw cap A and through the bottom of the casing l5 to the inside thereof, to support the arm. F, which letter is pressed on by a spring l connected with the post B or other support, and somewhat weaker than the ernuu ture spring E. I

The upper end of the fixed electrode H connects with the shank I of a. binding post I held on the casing B, which letter also supports the binding posts J and J connected with the positive and negative wires of the electro-inognet C. When the several parts are in the position of rest illustrated in Figs. 1 end 3, then the moviible'elcctrode G is out of contact with the fix-ed electrode H, and the armature D is out of register with the cores of the electro-nui-gnet C. Now when the electrommgnet (l is energized and the armature D is caused to swing in the direction of the arrow a, then the erm 1* follows the armeture owim to the tension of the spring F, so that the e ectrode G makes contact with the electrode H previous to the :irmatufre D reaching the end of its stroke. N ow when the electromagnet (l is denorgized, then the armature D is caused to swing n the reverse direction of the arrow o by the action of the spring E, and in doing so the armature D, after it has acquired some momentum, strikes the arm F by the pin D so that the arm 11 is caused to swing quickly in the in.- verse direction of the arrow a thus causing a turning of the shaft i and the electrode G, to break contact with the electrode H,- thereby producing a powerlulspork. It is understood that the hrmoture D, on its return stroke under the tension of the spring E, ovcrcoines the tension of the spring 1*" connected with the arm 1*, and consequently the l mature l) cz'iuses 2). quick breaking of the delivering a the arm F by the yin D".

The electrical connections engines are shown in Fig. 5, while in Fig. 6 represented the electrical connections for low speed engines.

in the diagrammaticview illustrated in Fig. 5, the/binding post-J-is connectedby the wire K with the circuit closer L'of any alpproved construction and connected with t e battery N or other suitable source of electhe battery being also constrong blow on contact between the electrodes G 53nd H, by,

for high speed.

nected by the wire K with the other binding post J. The circuit closerLis also connected through the ground on engines represented K, K, and consequently the armature D is actuated as previously described, to allow the electrode G to make contact with the electrode Hby the action of the spring F. When this takes place the circuit 0, 0 containing the spark coil P is closed, and when the circuit closer Lbreaks the battery circuit K, K then the armature D returns, but the rimary coil circuit 0, 0 remains closed an eonsequently the full power of the battery N passes through the contacting electrodes G and H. Now while the armature D. is returning it moves away from the cores of the electro-magnet C and finally strikes the arm F, to disconnect the electrode G' from the electrode H, thus producing a spark of the :full power of the battery. It is understood that the above-described operation is repeated for each igniting device of each cylinder, as will be readily understood by reference to Fig. 5.

In the arrangement shown in Fig. 6, the

battery circuit K is dispensed with, and in this case the electro-ma'gnet C is connected with the binding post I, so that all the current passes through the electro-magnet C first, till contact is made between the electrodes G and H, when the entire current is short circuited to the electro i'les G and H until the contact is broken between the electrodes G and H. i r v It is understood thatwhen the armature D is on the return stroke, the entire attraction of the cores of the electro-magnet Chas ceased at or before the time the pin D strikes the arm F, so that the full power of the spring E "name to this specification in the is utilized in addition to the acquired mo mentum oi the armature, to forcefully break the contact betweei r the electrodes G and H, and as the entire electrical energy passes through the electrodes, a very powerful spark is produced.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent:

1. A sparker, comprising an electro-magnet, a swinging armature, a spring normally acting to move the armature away from the magnet, a fixed electrode, a movable electrode, a swinging arm rigid with the movable electrode, a spring acting on the arm to normally retain the movable electrode in contactwith the fixed electrode, and a pin on the armature lor engaging the arm to move the electrodes out of contact, the spring connected with the armature being of greater strength than the spring connected with the;

swinging arm:

2. A sparker comprising an electro-magnot a swin in armature a s rin normall acting to move the armature away from the magnet, a fixed electrode, a movable electrode, a swinging arm rigid with the movable" trodes, and a circuit breaker for closing the said electro-magnet circuit.

In testimony whereof I have signed my presence of two subscribing witnesses.

GABRIEL P. B. HOYT.

Witnesses Tnno. G. HosTER, JOHN P. Davis. 

